Manufacturing procedure of hand tool

ABSTRACT

A manufacturing procedure of a hand tool includes the steps of: forging the workpiece, annealing the workpiece, rolling the workpiece in a barrel, performing a first surface treatment, machining the surface of the workpiece, performing a heat treatment on the workpiece, performing a second surface treatment, performing a third surface treatment, vibrating the workpiece, and electroplating the workpiece. Thus, the whole surface of the hand tool has the same color and brightness, thereby enhancing the aesthetic quality of the hand tool.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a manufacturing procedure of ahand tool, and more particularly to a manufacturing procedure of a handtool, wherein the whole surface of the hand tool has the same color andbrightness, thereby enhancing the aesthetic quality of the hand tool.

[0003] 2. Description of the Related Art

[0004] A conventional manufacturing procedure of a hand tool (such as awrench) in accordance with the prior art shown in FIG. 4 comprises thefollowing steps: forging the workpiece into a semi-product,sand-blasting the workpiece, machining the workpiece, including marking,typewriting, forming a concave portion in the shank of the workpiece,drilling and the like, rough polishing the workpiece, and electroplatingthe workpiece, thereby forming the product such as the wrench as shownin FIG. 5.

[0005] However, as shown in FIG. 5, the corner of the concave portion 3of the wrench produces a rough face 1, and the corner of the mark alsoproduces a rough face 2, thereby decreasing the aesthetic quality of thewrench. In addition, the surface of the concave portion 3 of the wrenchand the surface of the wrench do not have the same color and brightness,thereby decreasing the aesthetic quality of the wrench.

SUMMARY OF THE INVENTION

[0006] The primary objective of the present invention is to provide amanufacturing procedure of a hand tool, wherein the whole surface of thehand tool has the same color and brightness, thereby enhancing theaesthetic quality of the hand tool.

[0007] Another objective of the present invention is to provide amanufacturing procedure of a hand tool including three surfacetreatments, so that the surface of the concave portion of the workpieceand the surface of the workpiece have the same color and brightness, andso that the workpiece has the optimum smooth surface.

[0008] A further objective of the present invention is to provide amanufacturing procedure of a hand tool including a first surfacetreatment to treat the surface of the workpiece, a second surfacetreatment to remove the fur produced during the machining process andthe carbon plate produced during the heat treatment, and a third surfacetreatment to treat the surface of the workpiece, so that the corners ofthe marks, the concave portion or the like of the workpiece have asmooth surface.

[0009] A further objective of the present invention is to provide amanufacturing procedure of a hand tool including an annealing process todecrease the structural hardness of the surface of the workpiece tofacilitate the following working process.

[0010] In accordance with the present invention, there is provided amanufacturing procedure of a hand tool, comprising the steps of:

[0011] (A) preparing a metallic workpiece to be worked;

[0012] (B) forging the workpiece into a semi-product;

[0013] (C) annealing the workpiece to decrease the hardness of theworkpiece;

[0014] (D) rolling the workpiece in a barrel, so as to remove the carbonplate produced during the annealing process;

[0015] (E) performing a first surface treatment to treat the surface ofthe workpiece;

[0016] (F) machining the surface of the workpiece;

[0017] (G) performing a heat treatment on the workpiece to enhance thehardness of the workpiece;

[0018] (H) performing a second surface treatment to treat the surface ofthe workpiece, so as to remove the fur produced during the machiningprocess and the carbon plate produced during the heat treatment;

[0019] (I) performing a third surface treatment to treat and smooth thesurface of the workpiece;

[0020] (J) vibrating the workpiece to remove the polishing linesproduced during the above processes; and

[0021] (K) electroplating the workpiece to produce an electroplatinglayer on the workpiece, thereby preventing the workpiece from beingrusted.

[0022] Further benefits and advantages of the present invention willbecome apparent after a careful reading of the detailed description withappropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0023]FIG. 1 is a flow chart of a manufacturing procedure of a hand toolin accordance with the preferred embodiment of the present invention;

[0024]FIG. 2 is a perspective view of the hand tool in accordance withthe preferred embodiment of the present invention;

[0025]FIG. 3 is a top plan view of the hand tool as shown in FIG. 2;

[0026]FIG. 4 is a flow chart of a conventional manufacturing procedureof a hand tool in accordance with the prior art; and

[0027]FIG. 5 is a perspective view of conventional the hand tool inaccordance with the prior art.

DETAILED DESCRIPTION OF THE INVENTION

[0028] Referring to the drawings and initially to FIG. 1, amanufacturing procedure of a hand tool (such as a wrench) in accordancewith the preferred embodiment of the present invention comprises thefollowing steps:

[0029] (A) preparing a metallic workpiece to be worked;

[0030] (B) forging 10: forging the workpiece into a semi-product;

[0031] (C) annealing 11: annealing the workpiece to decrease thehardness of the workpiece;

[0032] (D) rolling the barrel 12: placing sands into a barrel to grindthe workpiece in a rotational manner, so as to remove the carbon plateproduced during the annealing process;

[0033] (E) first surface treatment: performing a first surface treatmentto treat the surface of the workpiece by rough polishing 13 and roughvibrating 14;

[0034] (F) machining 15: machining the surface of the workpiece,including extruding and forming, marking, typewriting, forming a concaveportion in the shank of the workpiece (such as the wrench), drilling andthe like;

[0035] (G) heat treatment 16: performing a heat treatment on theworkpiece to enhance the hardness of the workpiece;

[0036] (H) second surface treatment: performing a second surfacetreatment to treat the surface of the workpiece by fine polishing 17, soas to remove the fur produced during the machining process and thecarbon plate produced during the heat treatment, wherein the secondsurface treatment is a larger area treatment;

[0037] (I) third surface treatment: performing a third surface treatmentto treat the surface of the workpiece by manual work or secondarymechanical sand-blast 18, wherein the third surface treatment is asmaller area treatment to treat the corner or the like of the workpiece;

[0038] (J) vibrating 19: vibrating the workpiece by the chemicalmaterial or vibration stones, to remove the polishing lines and treatthe small pores at the surface, so as to enhance the integrity of thesurface; and

[0039] (K) electroplating 20: electroplating the workpiece to produce anelectroplating layer on the workpiece, thereby preventing the workpiece(such as the wrench) from being rusted.

[0040] In the step (D), the process of rolling the barrel 12 can bereplaced by a sand-blasting process. However, the workpiece willproduces small pits during the sand-blasting process. Thus, themanufacturing procedure in accordance with the preferred embodiment ofthe present invention employs the process of rolling the barrel 12.

[0041] In the step (E), the process of the first surface treatment cantreat the small pits produced during the sand-blasting process.

[0042] Accordingly, the manufacturing procedure of the present inventionuses an annealing process to decrease the structural hardness of thesurface of the workpiece to facilitate the following working process. Inaddition, the manufacturing procedure of the present invention uses afirst surface treatment to treat the surface of the workpiece, a secondsurface treatment to remove the fur produced during the machiningprocess and the carbon plate produced during the heat treatment, and athird surface treatment to treat the surface of the workpiece, so thatthe corners of the marks, the concave portion or the like of theworkpiece have a smooth surface. Further, by the three surfacetreatments, the surface of the concave portion of the workpiece and thesurface of the workpiece have the same color and brightness, so that theworkpiece has the optimum smooth surface.

[0043] Thus, the wrench 30 made by the manufacturing procedure of thepresent invention shown in FIGS. 2 and 3.

[0044] Although the invention has been explained in relation to itspreferred embodiment(s) as mentioned above, it is to be understood thatmany other possible modifications and variations can be made withoutdeparting from the scope of the present invention. It is, therefore,contemplated that the appended claim or claims will cover suchmodifications and variations that fall within the true scope of theinvention.

What is claimed is:
 1. A manufacturing procedure of a hand tool,comprising the steps of: (A) preparing a metallic workpiece to beworked; (B) forging the workpiece into a semi-product; (C) annealing theworkpiece to decrease the hardness of the workpiece; (D) rolling theworkpiece in a barrel, so as to remove the carbon plate produced duringthe annealing process; (E) performing a first surface treatment to treatthe surface of the workpiece; (F) machining the surface of theworkpiece; (G) performing a heat treatment on the workpiece to enhancethe hardness of the workpiece; (H) performing a second surface treatmentto treat the surface of the workpiece, so as to remove the fur producedduring the machining process and the carbon plate produced during theheat treatment; (I) performing a third surface treatment to treat andsmooth the surface of the workpiece; (J) vibrating the workpiece toremove the polishing lines produced during the above processes; and (K)electroplating the workpiece to produce an electroplating layer on theworkpiece, thereby preventing the workpiece from being rusted.
 2. Themanufacturing procedure of a hand tool in accordance with claim 1,wherein the step (D) includes placing sands into the barrel to grind theworkpiece in a rotational manner.
 3. The manufacturing procedure of ahand tool in accordance with claim 1, wherein in the step (E), the firstsurface treatment is performed by rough polishing and rough vibrating.4. The manufacturing procedure of a hand tool in accordance with claim1, wherein the step (F) includes extruding and forming, marking,typewriting, forming a concave portion in the shank of the workpiece,and drilling.
 5. The manufacturing procedure of a hand tool inaccordance with claim 1, wherein in the step (H), the second surfacetreatment is performed by fine polishing.
 6. The manufacturing procedureof a hand tool in accordance with claim 5, wherein the second surfacetreatment is a larger area treatment.
 7. The manufacturing procedure ofa hand tool in accordance with claim 1, wherein in the step (I), thethird surface treatment is performed by manual work or secondarymechanical sand-blast.
 8. The manufacturing procedure of a hand tool inaccordance with claim 7, wherein the third surface treatment is asmaller area treatment.
 9. The manufacturing procedure of a hand tool inaccordance with claim 1, wherein the step (J) includes vibrating andgrinding the workpiece by chemical material or vibration stones.
 10. Themanufacturing procedure of a hand tool in accordance with claim 1,wherein in the step (D), the process of rolling the workpiece in abarrel can be replaced by a sand-blasting process.
 11. The manufacturingprocedure of a hand tool in accordance with claim 10, wherein in thestep (E), the process of the first surface treatment can treat smallpits produced during the sand-blasting process.